Tire-wrapping machine.



J. W. H. DEW. TIRE WRAPPINGMAGHINE.

APPLICATION FILED 00T.11, 1913.

1,1 1 6,806. Patented N0v.10,1914f J. w. H. DEW. A TIRE WRAPPING MACHINE.

APPLICATION FILED 001211, 1913. 1,1 16,806, v u Patented Nov. 10, 1914.

2 SHEETS-SHEET 2.

ga@ MdL/gm :UNITED srAfrEs PATENT oEErcE.

JAMES WALTERHENRY DEW, oiseLoNnoN,i ENGLAND.

TIRE-WRAPPING- MACHINE.

T0 all whom t may concern Be it known that I, JAMES WALTER HENRY DEW, subject of the King of Great Britain and Ireland, and resident of London, E. C., in the county of London, England, have invented -certain new and useful Improvements in Tire-VVrapping Machines, of which the following is a specication.

My invention relates to improvements in machinery for manufacturing the outer covers of pneumatic tires' and like articles and has reference to that typ'e of machine in which-a fixed gapped frame is employed to support a rotatable gappedring carrying a reel or reels supplied with narrow fabrics or the like, such gap ed frame and ring allowing the passage t erewith of a core or mandrel upon which the narrow material is to be wound by the combined rotation of the gapped ring and mandrel, the object of my invention being to provide improvements in the general construction and arrangement of such machines including specific and novel arrangements of certain parts all particularly adapted for the manufacture of outer covers or tires in which the foundations or casings are composed of fabric or equivalent material in the form of strips or ribbons wound around a mandrel or core at an angle thereto so that the strips may be crossed first in one direction and then in the other to the thickness of casing required.

My invention comprises a machine in which the aforesaid strips are wound around a. mandrel of an irregular oval or othersuitable cross sect-ion; means for positively driving the mandrel or core, means for cutting the casing so that it can be doubled or opened up to make the beaded edges of a tire cover where such is' necessary; means for supporting the mandrel or core; means for holding and winding the strips of niaterial around the mandrel and other features which will be hereinafter more fully described.

My invention will be fully described with reference to the accompanying drawingsin which- Figure l is a front elevation of the ma-A chine, partly in section, Fig.' 2 is a plan, partly in section, Fig. 3 1s an elevation of one of the strip-carrying drums,showing the braking arrangement and Fig. 4 is' a.

sectional elevation showing the driving,r connection With the mandrel.

` In accordance-with my invention I com struct the machine with a suitable bed a adapted to support the various mechanical motions forming the complete machine. 'On

4,this bed I mount a driving shaft b adapted Specification of Letters Patent. i Patented NV, 10, 1914. Application led October 11, 1913. Serial No. 794,697.

change speed gear, a speed cone or other means by which the speed of the driving` 'shaft may be increased or decreased at will. In one motion the driving shaft transmits motion to a mandrel or core c of irregular oval or other suitable cross section aroundwhlclrthe strip to form the casing Vof the tire cover or the like is to be wound.

According to one of the arrangements for driving the mandrel, the power shaft b has a pinion e gearing with wheel f fixed on shaft-g which constitutes the mainshaft of the machine from which the various motions are driven. To drive the mandrel this last named shaft g carries worms 7L driving worm wheels c' fixed Aonshafts j supported iii bearings 7c, such shafts or the worm wheel bosses carrying bevel wheels m that, in turn drive bevel pinions n fixed on shafts o supported in bearings 7J. The upper ends of the shafts o project beyond the bearings in squared form' and have loosely mounted upon them bosses (j on which, in turn, (see Fig. 4) are mounted sprocket wheel rings 7' provided with teeth s so formed or pointed at the ends as to constitute cutters or perforators adapted to pierce the strip of niaterial s1 wound around the mandrel c and at the same time drive the latter. To enable this to be effected the mandrel c is provided with an inner portion or with a ring t connected to it at its inner side having a number of sprocket holes u by means of which it is driven through the agency of the teeth s just referred to. Ilach sprocket ring 7', during driving, is fixed to the boss (l by a set s screw fr, key or by any other simple form of connection so that the lwheel .is adapted to rise on its shaft 0 while turning with it as the thickness of the wound strip s1 increases i and as the mandrel consequently rises from the original position. Further by means of mounting the sprocket wheel on an axially vslidable boss such as g which can at one time be `fixed to it and at another time be disengaged therefrom, the wheel 'with its rings 1' when the latter can be move teeth can (be slid laterallyaway from `the mandrel out of action. In the arrangement n shown the setscrews are disengagedand the slidable bosses q lifted up out of thes rocket laterally to, disengage their teeth from the man1 drei c. The mandrel o is supported on or between conical rollers or pulleys -fw made in two .resilient pressure on the', upper vhalves of 'half pulleysl are remova and thus keep the mandrel down to its worinv Any other suitable arrangement to allow 'of the pulleys may` be employedgv .The upper le to' enablethe mandrel to be placed in vand taken out of position and they and their bottom halves fare positively driven fromv their shafts 2.

-Three pulleys'w are arranged so as to support the mandrel at' that number of points; 'Ihe shafts 2 carryin the V -pulleys are driven positively but t e ulleys themselves drive the mandrel c by riction. In other words they act as subsidiary drivers tothe sprocket wheels r but can slip as required. The shaft supporting each pulle, may be d1vided by a transverse joint an onepart be pivoted to the other so that when the pulleys are in actual use the shaftis kept rigid by virtue of the pulley or. a portion of it crossing the joint. On the other hand when it is desired to place the mandrel in position the upper'half of each pulley may be lifted up beyond the joint in the shaft and allow the latter to be turned to one side away from the mandrel. The same effect may be obtained by ivotin the shaft of each pulley at a point elow t e latter, means being enI ployed to keep the shafts in proper position during the normal working of t e machine.

In the drawings shown the shafts 2 carrying the pulleys-'w are driven from the shaft g by bevel wheels 3 gearing with corresponding wheels 4 on shafts 5 which have at their opposite ends bevel pinions 6 gearing With wheels 7 on the lower ends of shafts 2. By these means the mandrel is driven frictionally, the ositive drive being throughl the agency of) the sprocket wheel mechanism previously described. The friction drive assists the latter and is likewise available when the tire cover is being cut circumferentially' on its inner face as afterward explained, at which time the sprocket wheels 1', are out of action. A

In conjunction with the means for driving the mandrel c or as means separate therefrom I employ a cutter device which may be in the form of a circular cutter mounted in a suitable position and adapted to be l of formin is pressed in the direction of the man-v brought into contact with the inner edge of i lthe casing s1 after the strips haye been fully wound for the' purpose of severin such casing and allowing the severed e ges. to be turned over upon themselves for the purpose the beaded edges of the tire cover. This cutter ma be brought' into 0pration at the finish o the winding .or it or another cutter may be brought into cutting position when the strips have been partially wound for the purpose of severing the casing partially. ,It should be said in this connection that the strips to be wound by the' machine forming the subject Vof my invention are usually strips having a fibrous warp of textile materialfwith no weft, held togetherin the vform of a ribbon of 011e or more plies in thickness by a rubber or other solution so that when the strips are Wound crosswiseas hereinafter explained the solution causes them to adhere together and to remain in position on the'mandrel o without displacement after the severing action has taken place. .l

That portion of the improved machine relating to the carrying and winding of the strips just4 referred to consists of supporting .rings 9 of a rigid character secured to the bassa of the machine, each having a gap 10 Y ata suitable oint to enable the mandrel c previousl re erred to being placed in position on t e pulle s fw. Each of these rigid rings is adapte to support within it a rotatable ring 11 also provided with a gap 12 for the urpose previously referred to. Each rotata le ring carries external spur teeth 13 driven by spur or other suitable `'gear 14 external to the ring which as to the actual driving connection with the ring itself is in duplicate so that both wheels 14 drive the ring at the same .time for the greater part ofeach revolution while each wheel is, in turn, out of gear with the ring while the gap 12 in the latter is passing it.

The center wheels 14 are fixed on shafts 15 driven by bevel gear 16 from shafts 1T which i'n turn derive their motion from. the shaft g through bevel gear 18. The firstnamed bevels on shafts 17 may have their driving connection with such shaftscontrolled by clutches 19 operated by forks 2O fixed on rods 21 actuated by hand levers 22 so that the ringsll may be started and stopped as desired.

The rotatable gear rings 11 carry brackets 23 which support studs 25 on which'are mounted the brake control reels 26 carrying the tapes or strips to be wound around the mandrel 0. The position of each ofthe driven rings 11 and the reels 26 is at such lan angle that the strips are Wound around the mandrel c angularly so that when'the 1,11e,'soe

with each other and in relation to the mandrel are thesame. The reels 26 are retarded by ad'ustable brake bands 27 so that the requlre tension may be put on the strips during windin I The motlonof the various parts is arranged in unison so that correct Winding takes place and all the chief mechanical motions of the machine may be put into action or be disengaged by clutch mechanism of suitable type.

In operation the ends of the strips to be wound around the mandrelare first secured to the latter in a suitable way, such mandrel having rst been placed in position on the pulleys lw. The-machineis then set in motion and the-mandrel rotated at a suitable speed. The gear ringsalso rotate at a speed with strict relation to that of the mandrel and carry the strip reels around the latter and at the same time cause the strips to be drawn oil' at a suitable tension. Such strips are wound at an angle to the peripheral surface of the mandrel and the several layers cross each other at an angle to themselves so as to thoroughly incorporate or tie each layer to the other. The several layers adhere firmly to each other as a result of the rubber solution and when a sutiieient thickness of casing has been formed, either partially or wholly, such casing is severed at its inner side by the cutters to enable the inner severed edges to be turned back to form the beaded edges of the tire cover and to enable the latter to be removed from the mandrel atthe finish of the Winding operation or after ity has been subjected to any further necessary processes to complete its manufacture. A

'I am aware it has been previously proposed to wrap strips of fabric around the outer cover of a tire prior to and as an aid to vulcanization, by means of reels revolving around and payin out the material, the cover being meanwhi e rotated by suitable mechanism such strips being afterward removed when vulcanization is completed.4

What I claim as my invention and. desire` to secure by Letters Patent is 1. In a tire wrappin machine, thil tombination, with a rcvolu le mandrel for the strips, and means for sup orting the mandrel with thc strips woun on it; of a revoluble driving` shaft journalcd adjacent to one side of the mandrel and a driving wheel which perforate the wound strips and drive the mandrel and the strips positively.

3. In a tire Wrappin machine, the combination, With a revolu le mandrel for the strips, and means for supporting the mandrel with the strips wound on it'; of a revoluble drivin shaft journaled adjacent to one side oft e mandrel, a removable hub mounted to revolve with the said shaft and slidable longitudinally thereon, and a wheell provided with means for securing it to the said hub and having teeth which perforate the wound strips and drive the mandrel and the strips positively.

4. In a tire wrapping machine, thc com bination, with a revoluble mandrel for the strips provided with a perforated ring on one side, and means for supporting the said parts with the strips wound on them; of a revoluble driving shaft journaled adjacent to the said ring, and a driving wheel carried by the said sha ft and provided With teeth which perforate the strips and engage positively with the perforations of the said rin 5g In a tire winding machine, the combination, with a revoluble mandrel for the strips, friction Wheels which support the mandrel with the strips wound on it, and means for revolving the friction wheels so that they assist in revolving the mandrel; of a revoluble drivin' shaft journaled adjacent to one side o the mandrel, and a driving wheel carried by the said shaft and provided with teeth which perforate the wound strips and revolve the mandrel and the strips positively.

ln testimony whereof I have hereunto set' my hand in the presence of two witnesses.

JAMES WALTER HENRY DEW.

Witnesses:

E. BURN, PHYLLis C.\'1'rEmuoLE. 

